IF Digitally Controlled Variable-Gain Amplifier
Typical Operating Characteristics (continued)
( Typical application circuit, V CC = 5.0V, max gain (B0 = B1 = B2 = B3 = B4 = 0), P OUT = 5dBm, R 1 = 825 ? , T A = +25°C, unless
otherwise noted.)
45
INPUT IP3 vs. ATTENUATION STATE
P RF1 = P RF2 = 5dBm
-30
2ND HARMONIC vs. FREQUENCY
-30
2ND HARMONIC vs. FREQUENCY
40
AT OUTPUT, ? f = 1MHz
-35
-35
35
f IN = 400MHz
-40
T A = -40 ° C
T A = +25 ° C
-40
V CC = +5.25 V
30
f IN = 50MHz
-45
-45
25
20
f IN = 200MHz
-50
-55
T A = +85 ° C
-50
-55
V CC = +4.75V
V CC = +5V
15
-60
-60
0
4
8
12
16
20
24
50
100
150
200
250
300
350
400
50
100
150
200
250
300
350
400
ATTENUATION STATE
O1P2 vs. FREQUENCY
(F1 + F2)
FREQUENCY (MHz)
O1P2 vs. FREQUENCY
(F1 + F2)
FREQUENCY (MHz)
51
49
47
45
P RF1 = P RF2 = 5dBm
AT OUTPUT, ? f = 1MHz
T A = +85 ° C
51
49
47
45
P RF1 = P RF2 = 5dBm
AT OUTPUT, ? f = 1MHz
V CC = +4.75V
V CC = +5.0V
43
41
T A = +25 ° C
T A = -40 ° C
43
41
V CC = +5.25V
39
37
39
37
50
100
150
200
250
300
350
400
50
100
150
200
250
300
350
400
-55
FREQUENCY (MHz)
3RD HARMONIC vs. FREQUENCY
-55
FREQUENCY (MHz)
3RD HARMONIC vs. FREQUENCY
-60
T A = -40 ° C T A = +25 ° C
-60
V CC = +5V
V CC = +4.75 V
-65
-65
-70
-75
-80
-85
T A = +85 ° C
-70
-75
-80
-85
V CC = +5.25V
50
100
150
200
250
300
350
400
50
100
150
200
250
300
350
400
FREQUENCY (MHz)
FREQUENCY (MHz)
6
_______________________________________________________________________________________
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